Device for transmission of motion of rotating bodies



i Feb. 4, '1930. v K. KozAK| 1,745,898

DEVICE FOR TRANSMISSION OF MOTION OF ROTATING BODIES Filed March 1, 1928l 4 Sheets-Sheet 1 mwntoi Feb. 4, 1930. K. KozAKl 1,745,898

DEVICE FOR TRANSMISSION OF MOTION 0F ROTATING BODIES Filed Maron 1, 1928 4 sheets-sheet 2 gunnen/6oz F I )Vaga/L 33H3 @lume/s355777@ Feb. 4, 1930.` K, KozAKl 1,745,898

DEVICE FOR TRANSMISSION 0F MOTION OF ROTATING BODIES v Y Filed March 1, 1928 y4 Sheets-Sheet 5 A Feb. 4, 1930.v K. KozAKl 1,745,898,

DEVICE FOR TRANSMISSION OF MOTION OF ROTATING BODIES Filed March 1, 1928 4 sheets-sheet 4 Patented Feb.. 4, "1930 KAZUQ Komix; ,orKo'BE CITY, Ieren, assienon. To MrrsUBsiII zosnivlKennisnini nEvICE ron TRANSMISSION oF MOTION or no'rA'rIivG BODIES` Application led March 1,- 1928, Serial No.` 258,888, andin Japan llllIai-{eh 3, i927; d

' The present invention relatesl to a device ortransinission of motion of rotating bodies Y having their axes of rotation parallel ornearlyl parallel' to each other bywhich the revolving motion of a rotating bodyfis transmitted to the otherrotating body, connecting two vrotating bodies by means ot two-stage quadrilateral link "chain with lopposite links hai'fin' ;A equallengths respectively.. The object-'ot the invention'is to maintain/a good vresult by applying lthe device to driving de-v vices of locomotivesorgeleetric inotorc'ars,

and the like, by makingV it easy Jco-transi'nit the Y revolving motiono a rota-ting body to' the other rotating body Ahaving axes oi:` rotation parallel orv nearly -parallel to eachY other, in

- the same'niiinber o frevoliitions without using y Y t'ating beltsv or gears,and to keep angular velocities ofthe two rotating bodies always equal, even 'when the' distance between the two axes changesin running condition of the two robodies'as long as the two axesl remain Y parallel to'each other.

'In the accompanying drawings: l `Figs. 1 and 2, are .explanatory sketches of working of the'device of the vpresent iiivenflig. 3 is a sideview showing only the main parts of the device of the'presentinv'ention applied to an electric locomotive;

Fig. 4 is a sectional side view of Fig. 3' out l d 'alongA-#B-CD-ELF-Glooking from the left'side and showing only the right half 4 wheel ,i

une..

'35' frointhe'centre line of the locomotive with links removed;

F ig. 6 is a detailed side View of the gear wheel; v. l

Fig. 7 a detailed side view of al link which connects a, drivingwheel and aconnecting y .Fig. 8 isa sectional Aside view oFig. 7 cut-` ting along D-H-.I-fD of Fig."3,showing at the vsaine timel a part of the driving: wheel, and apart of the: intermediate link, which are jointed to both 'endsof the'connecting link, and apart'` ofthe'gear wheel;

1 Figa isadetaiied side View of a iinkawiiicil rie. 5 is a iaaiidlseeview of the driving connectsthe gear wheel and the intermediate` link;and l. Y.

i Fig. '10- is asectionalplan of' Fig. 9.A out the saine time a part of the gear Wheel, and a part of the interinediatev link which are jointed to bothends' oi' the'connecting link.

i/Vhen'rotarymotioiifoiv an electricinotor is transmitted toy the driving vaxlei in a vreduced numberof revolutions b y meshing of apinion lixed to` the electiiemo "or: shaft' 'and' a ygear Wheel directly fixed to the drivingaxl'e, in the Vtype i of an electric. locomotive' with an elec@ tric'inotor fixed to airame' supportedV by' springs of axle boxes of driving'axle,the distance between the electric-inotor'shaft and the drivingaxle varies because'theloeo'niop tive frame vibrates as the locomotivefruns,

and consequentlv the rate of meshing of gears j vvaries also, and therefore itis al'inostwim` possible practically to transmit' the motion to transmit the motion with thehelposo-me proper flexible device for transinissionof neo-A tionwhich is placed betweenthe gearwheel electric motor shaft. f this lzindfot devices kof transmission of' motion heretolier fore invented, some are provided' with a'fhol low driving axle, :throiigh' the hollow Vll'bart of which passes an intermediatel shaft, one

end of which isv connected'to onevend of the vo K by sucha simple device, and; vit is advisable Y driving -axl'e Vandthe other end to the gear -wheelby a kind of'unilversal coupling respec`` tively,'and some 'of theml are providedvwith a hollow gearwheel shaft with diameter a trifle largerthan that ofthe wheel shaft and by passing the driving axl'ethrough this 'nected by a pair of levers with a gear segment at one end, pivoted at the centre' to the geary vhon-0W Sheath@ gear when. and the (givingwheel, and by a pair of lnkspivotcd at one end to the driving wheel, the other ends of the levers and links bei ng connected with each other.

Butthe First two kinds of devices are accompanied with such diiculties in manufacture as using a hollow` shaft and the last one has such detects that the angular velocities of the gear wheel and driving wheel are always unequal, excepting only when the axisof the driving wheel perfectly coincides with that of the gear wheel, and that the levers with gear segment are needed. Y

In the device ortransmission otmotion of the present invention, the construction is simple and consequently its manufacture and treatment are easy as it consists of links only. The present invention being based upon the two points, that an open link chain consisting of four or more than four links connected in series has such a property, that one of the end links can take Vany position, within a certain range, while the position of the other being fixed; and that in a quadrilateral link chain with opposite links having the same length respectively,the opposite links are always parallel to Veach other, i. e., the

opposite links make the same angular dis-V placements respectively; the defects of the devices for transmission of motion as described above could preferably be removed by the device for transmission of motion of the present invention.

Since the first point is evident, we will here dispense with explanation on this point;

the second point is also a well known fact, but will explain a little on this point.

In Fig; 1, 1 is a disc which can rotate taking 2 as axis, and constitutes a link of the link chain, 3 and 4 are links of equal length andV oneend of them are jointed to the disc 1 at the points 5 and 6 respectively by means of pins` parallel tothe axis 2, and the other end of them are jointed to the link 7 at the Vpoints 8 and 9 respectively by means of pins parallel to the raxis 2, the distance between 8 and 9 being equal to that of, that is to say, a quadrilateral 5, 6, 9, 8 which is thus formed is a parallogram. Y

Y In such a construction, it requires no proof that the line connecting 8 and 9 is always parallel to the line connecting 5 and 6, even when 3 and 4. rotate taking 5 and 6 respectively as their centre, and when the link 7 i, takes any position. The chain lines show a changed position of the link 7.) Hence the disc 1 and the disc 7 make the same angular displacement when they rotate, because if the disc 1 rotate rightwards `taking the axis 2 as centre, a magnitude of an angle which the line connecting 5 and 6 and the line connecting 8 and 9 make with a horizontal line. M, N passing through the centre of the axis 2, will change with the rotation of the vdisc 1, but as the two lines are to be paralleled to each other the magnitudes of angles which both lines make with the horizontal line M N changes equally, in' other words, the line connecting 5 and 6 and the line connecting 8 and 9 make the same angular displacement, and they never make any relative angular displacement between them ing four links in succession at their both ends, v Y the opposite links always make the same angular displacement. Y Y

The accompanying Fig. 1, is as explained above, one example of this quadrilateral link chain and shows two-dimensional relative motion of opposite links, in vother words, relative motion of the line connecting 8 and 9 to the line connecting 5 and 6 in the same plane. In the case of the three-dimensional relative motion, i. e., when all the links 3,4, land 7 are not contained in the same plane, this link chain is also to be included in the above mentioned quadrilateral link chain as one of its modification, provided that the link 7 travels always parallel to a certain plane containing 5 and 6; and any appropriate method can be adopted for construe# tion of jointing the links. Y

In' Fig. 1, if we joint other links having a length equal to that of the links 3 and 4 to the disc 1 and link 7 at oneend andthe other end respectively `parallel to the links 3 and 4, there will occur no difference in relative motion between the links, therefore this link chain is a modification ot' the above -mentioned quadrilateral link cha-in.

` Then we Vwill now proceed to explain the sketch Fig. 2 showing one example of the device for transmission of motion oi' rotating bodies of the present invention.

Y 10 is a large disc which isvone of the two rotating bodies and 1l is a ring forming an intermediate link, and these 10 and 11 are so ointed by pins perpendicular to the plane of paper as to compose a quadrilateral link chain with opposite links having equal lengths respectively, together with links V12 and 13 of an equal length. 14 is a small disc which is the other of the rotating bodies and has an axis of rotation parallel or nearly parallel to that of 10, and 14 is also so jointed by pins perpendicular to the plane of paper as to compose a quadrilateral link chain with opposite links having equal lengths respectively, together with the common ring ll and links 15 l mensen l., If the large disc rotates taking its cen-y v tre as axis, the ring 11 rotates with an angular i velocity equal to that of the large disc 10,7as

apart of 11 constitutes the link opposite to 10, and the small disc 14 rotates with an angular velocity equal to that oi' the ring 11,*as a part of 14 constitutes the link opposite to 11,V

that isto say,the smalldisc 14 rotates with an angular velocity equal tothat of the large disc 10. Therefore if the small disc v14 is so made that it can only rotate taking its centre' as axis, this small disc rotates with an angul lar velocity equal to that of the large disc tak--r ing its centre as axis, and it is evident that any difference does not occur between angular velocities of the two discs when the axis of the small disc coincides with that of the large Vdisc at the point O, as shown'in Fig. 2, or

' when these two axes do not coincide; but the rangeinwhich the distance between the axes of discs can be changed is to be determined by the lengths oflinks andpos/itions Vof joints.

It is evident that any difference does not occur between the angular velocities oboth discs even when either one of the discsrapidly moves relatively tothe other disc, that is,

Y 'the distance between axes of the two discs,

Vvaries maintaining their axes parallel to each other, and that the lmovement of yeither one of thediscs does not inluence the other disc,

as this is a link chain consisting of five sets of links, the large disc 10, thepair of links 12 and 13, the intermediate link 11, the pair of links 15 and 16, andthe small disc 14, con

nected in series, the discs 1() and 14 being the endslinks, as already stated in the irst point.

f The above is an explanation of the case when the two axes of rotation are parallel to eachother, but ifa proper-*method is employed at`the jointing points between the links, the device of the present invention can obtain nearly the same'eect by applying the device of the present invention vto practical use, even in case when the two axes oit' rota- `5o tion are nearly parallel to eachother,

Fig. 3 to Fig, 10 are examples of applicay tion of the present inventiontoan electric locomotive, showing only its m'ainnparts;

17 is a driving wheel ixed to one endqofa driving axle 18, 19 is an axle box',20 is a frame o and is supported by a spring 21 of the axle box 19, and the frame 20 is allowedto move only up and down against the axley box, consequently against the `driving axle and thejdriving wheel. 22 is an electric motor supported by the frame 20, 23 is the shaft of 22, Y.

24is a pinion vfixed on one end of the motor shaft, and 25 is a bearing, and this bearing is fixed vto the frame 20 in an appropriate manner. 26 isa gear wheel meshing with the pinion 241 fand is? to; bel frreely irritated. amnlndra pin jourrnal 27 taking itl aslaxisgand ipin journalf27 issupported at al'ower parrot'a bracket28' fixed to the lower part of the bea-rf ing' 25l and the frame 205,5 and. the'z distancev between '25E andthe electric motor: shaft 23u-s to be kept constanti- 29. i's an intermediate link and is so jointed with a pair of connecting links-36' and: 311 andthe gearwheel 26bsy pins 3anlik @han wat; Opposite Vlinks: hangs-equal :33, 34 andi', as to compose a quadrilateral lengthsrespectively, andlthe abfoveintermedr atel'ink`29 is also sojointed' with; anothenpair otcon-necting links 'and' '37. and: the driving 'pose' a quadrilaterallink chain withopfpesite linksl havingequal length respectively', and

.these four-pinsarerm-ade in spherical jgointin l order toI transmit motionperteictly event when thedriving axle 18 slightlymaves axially and 5 inl ordertofravoid straining of-fthe' mechatheadr'ivi'n'g axle-48 are not,"paral'le'latoeach f l other. f

f 42 and v43' arefholesmade'on thegearwheel 26tolet through the 'pins-39 `andf41. Rota- 'tionofv the-electric motor lis: transmitted from thepinion24 to thegear wheel 26 bywwhich Y the number of revolutions'. isv reduced-rand -it is then transmitted: to 'the' driving-wheel 417 means of the link chainaf lThe number :of

by revolutions of the gear-wheel 26 andthe driving wheel-17 arex always equal and their angular velocities are also equal, as can be Vunderstood by the explanation of Fig. 2 because the gearl wheel 26 and the driving wheel 17 are connected by means of two-stage quadrilateral link chain-with oppositevlinks having y* equal lengths respectively. (But slight dif-l ference between angular velocities of the gear wheel and the driving wheel may occur whenv both rotating axes become non-parallel to y each other, but this diierence is so small that it ispractically negligible.) Shock is never transmitted tothe gear wheel through the link chain, even when the'driving wheel v1- brates up and down quicklykby some cause.V

o Thus the present invention has a superiorV result, compared with old device for trans-7 missionof motion applied to electric locomo- :et

tives as the angular velocities of both rotatingy y bodies'do not change absolutely as long as the axes of rotation remainparallel to each other,

and as the mechanism of the device is simple. j rfi/2ol I explainedabove the device of the present invention mainly kwith regard to electric locomotives, but, inshort, the present invention relates to a devlce for transmission of motion of rotating bodies by which the revolving motion of a rotating body is to be transmitted f to the other rotating body, connecting two ige rotating bodies, having their axes of rotation parallel or nearly 'parallel to each othergby means of the two-stage quadrilateral link chain with opposite links having equal lengths,

respectively, and modifications Within the limits ofnot losing its essential points can be properly Worked out in such a manner that they can be applied not only to the device for 5 transmission of motion in electric locomotives, but to all kinds of devices for transmis- Y sion of motion of rotating bodies. I claim: Y In an electric locomotive, the arrangement 10v Lof a device for transmitting rotary motion of .the type hereinbefore referred to yin which -onev pair'of parallel links are connected directly to the running Wheel or driven mem- `berv and to a floating ring forming the inter- Y15 mediate member, so as to constitute one jointed parallelogram, the other pair of parallel 'links being valso directly connected to said floating ring, and to a gear Wheel mounted in the locomotive frame, to constitute the second 20 jointed paralellogram, the intermediate memJ ber and-the two pairs ofV links connectedv thereto being positioned on the outside of the gear Wheel, one pair of'links being connected at their other ends direct to said gear Wheel 25 .on the outside thereof, the other pair of links being connected to pins which lpass through suitably arranged holes in the gear Wheel and are iXed to the running Wheel and the said gear Wheel being in mesh With a pinion fixed so on the elect-ric motor shaft also mounted on the locomotive frame.

In testimony whereof I alix mysignature.

, KAZUO KOZAKI. 

